DOCS-11343 Add warning about incorrect syslog timestamps

Author: kallimachos

source/includes/options-conf.yaml

@@ -295,6 +295,14 @@ description: |
 
   If you do not specify :setting:`systemLog.destination`, MongoDB sends
   all log output to standard output.
+  
+  .. warning::
+  
+     The ``syslog`` daemon generates timestamps when it logs a message, not
+     when MongoDB issues the message. This can lead to misleading timestamps
+     for log entries, especially when the system is under heavy load. We
+     recommend using the ``file`` option for production systems to ensure
+     accurate timestamps.
 ---
 program: conf
 name: systemLog.timeStampFormat

source/includes/options-mongod.yaml

@@ -305,6 +305,14 @@ description: |
   than to standard output or to a log file. , as with :option:`--logpath`.
 
   The {{role}} option is not supported on Windows.
+  
+  .. warning::
+
+     The ``syslog`` daemon generates timestamps when it logs a message, not
+     when MongoDB issues the message. This can lead to misleading timestamps
+     for log entries, especially when the system is under heavy load. We
+     recommend using the :option:`--logpath` option for production systems to
+     ensure accurate timestamps.
 optional: true
 ---
 program: mongod